Filter element



FIG. 1 is a first side view of a filter element according to the design;

FIG. 2 is a front and back side view of a filter element according to the design;

FIG. 3 is a second side view of a filter element according to the design;

FIG. 4 is a bottom side view of a filter element according to the design;

FIG. 5 is a top side view of a filter element according to the design; and,

FIG. 6 is a perspective view of a filter element according to the design.

The broken line showing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a filter element, as shown and described. 